The virus is causing some math summer programs to cancel. Surprisingly, this led to something wonderful. Unusually strong undergrads are starting to run their own online summer math programs for high school students.
1. The MORPH program is run by the Harvard math club. It offers a variety of mathematical topics at different levels of difficulty. It is not only free, but also subsidizes books for admitted students.
2. Alec Sun’s program seems to be more focused towards research.
I know students from the staff of both programs and believe that (math-wise) they are some of the strongest in the country.
(As usual, high-school students who wish to do a research project are also welcome to contact me. Unlike the above, this is not for a summer project. This is for students who wish to spend a large amount of time spread over a many months, with the goal of producing their own research paper. See more here.)